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no bs this time hot news gnd hack pin 4 stayed wired between stm and panel but pin 8 and 16 wired together direct to panels from power pack and 2 gnd pin 8 and 16 hub 75 remove from stm32 discovery output a hack double gnds on power pack 17/07/2017


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addded 2 gnds 240 volt cable and solided to 2 way hub on top also double the grounds from power pack

as i helps and make grounds stronger as pictured below

1500305528006-556124445.thumb.jpg.5fc3036a1b21c7f04505fe7a3485dc26.jpg

take note that - negative are wired together from power pack screw tap

also moved voltage resister maked (201) above says v+ adj on power pack  @ 4.81 volt

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scratched duel shield with screw driver and added gnd and solidred

cable hopefully uncal sasha will add a gnd tag in rev v2.0 version 

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thicker cable needed between power pack and panel 5volt red and black - to help noise and amp drain

http://m.ebay.co.uk/itm/21-AMP-1-5mm-ROUND-12V-24V-2-Twin-Core-DC-Power-Cable-Wire-Car-LED-Light-Auto-/322538821623?var=&hash=item4b18cfd7f7%3Am%3AmdZKAKRETOvjsj2GQtjBRYQ&_trkparms=pageci%3A60e9ba41-68bc-11e7-b8e3-74dbd180c7ac%7Cparentrq%3A4235972615d0aa12eb5663e6ffe7b3f8%7Ciid%3A6

i also notice  if i wire pin 16 and 8 i lost leds reverse it and they come back on

p5 updated and fixed finaly pin 16 from stm to gnd of power pack

also ask seller to supply 1 meter of 5 volt + cable the black -5 are tide off and split between

 p4 update below read this message to uncle sash to understand a fix sm5166p 

Screenshot_20170713-231943.thumb.png.bc537d04c5c7f844759aa37e290282eb.png

videos of above fix 

received_1336855859770118.mp4

received_1336855343103503.mp4

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this also give me a idear to make a pcb dasiy chain rather then a cable one

wiith 2 male hub  on a pcb 

so pin 1 2 3 4 5 6 7 9 10 11 12 13 14 15 stay conected between stm output and panel input

pin 8 and 16 wired together and add gnd from power pack to them can a special pcb be made

 

Screenshot_20170710-035500.thumb.png.949c6104e55a4b8ab2a380c59f383e81.png

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panels  that i have all tested and works

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http://s.aliexpress.com/NRrYZNVf 

 

Screenshot_20170713-075852.thumb.png.99b4b6c313d39b7d670da2b06704e5d0.png

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wiring video and testing

received_1333064116815959.mp4

received_1333062453482792.mp4

p5 remove pin 8 16 on daisy chain and between stm 32 and panel keeping pin 4 connect with gnd in the middle

1499695804892871789493.thumb.jpg.ec0959675b944719fbed23f0e967a76a.jpg

pin 16 and 8 on daisy chain on panel right  tied off from left panel pin 4 only

 

all pins 4 8 16 all tied off on input of panel

I was also thinking of changing the gnds swaping pin 4 for 8 8 for 4 keeping 16 on the chain

as 1 gnd for each

red a b = gnd 4

blue a b = gnd 8

green a b = 16

incase panels are wired

old video look at the top one on p5

1499594540234-1657992516.thumb.jpg.95694a03f500463d36c818ae9a86fb03.jpg

 

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